Local installation of 13.0.1-4 via DoliDeb on Kubuntu 20.04

Okay, I followed the instructions of the linked tutorial. It lead me to two problems:

  1. “Prerequisites: Access to the MySQL root user credentials”
    Where would I have set the MySQL password? These fields on page 4 of the wizard?


    I have never used MySQL prior to the DoliDeb installation.

  2. I ran the command “sudo mysql -u root -p” in the terminal and entered my sudo password. Afterwards I got another promp “Enter password:”. I assume it is for the MySQL password mentioned above. Whatever I type in I get the message
    “ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/run/mysqld/mysqld.sock’ (2)”.

What did I do wrong?